bad play or luck?

Is it possible to run at -10 BB/100 on 700 hands in Fixed limit as result of bad luck, variance...or that must be bad play?
Just lost 14$ that was earning about whole week with winrate 1.5-2 BB/100, and I think that whole session I played my A-game, maybe started tilting last 50 hands...but recognized that and stopped playing.
It just feels very disappointing....